28566840255511 has 2 divisors, whose sum is σ = 28566840255512. Its totient is φ = 28566840255510.

The previous prime is 28566840255487. The next prime is 28566840255557. The reversal of 28566840255511 is 11555204866582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28566840255511 - 2⁵ = 28566840255479 is a prime.

It is a super-2 number, since 2×28566840255511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28566840256511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14283420127755 + 14283420127756.

It is an arithmetic number, because the mean of its divisors is an integer number (14283420127756).

Almost surely, 2^{28566840255511} is an apocalyptic number.

28566840255511 is a deficient number, since it is larger than the sum of its proper divisors (1).

28566840255511 is an equidigital number, since it uses as much as digits as its factorization.

28566840255511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040000, while the sum is 58.

The spelling of 28566840255511 in words is "twenty-eight trillion, five hundred sixty-six billion, eight hundred forty million, two hundred fifty-five thousand, five hundred eleven".